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Old 05-01-2014, 06:48 PM   #1
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yj wont start.. HELP!

so heres my issue:

my buddy was driving my 93 YJ and it died all of a sudden, and it still had power. My Yj's fuel pump has died in the past and it did the exact same thing, died while i was driving it and it still had power just obviously no fuel was getting to the engine. However, i dont think it is the fuel pump this time due to the fact that when i turn my key a quarter turn, i can hear the fuel pump turn on and i also sprayed starter fluid into my intake and it still did not start. last time it would have started. I charged the battery just to make sure and it has power, just wont start. buddy of mine said it was the starter but a bad starter wont turn off your jeep while driving... im thinking it is something to do with the ignition process which could be the fuel pump...

any ideas? thanks

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Old 05-01-2014, 07:21 PM   #2
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update: just took the fuel lines off and turned the key and fuel squirted out, so not s fuel pump issue. the battery is a little lower on power then what is was a couple days ago when i tried to jump it... is this an electrical issue? if so, what electrical problem could cause the jeeps engine to turn off while running??

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Old 05-01-2014, 08:29 PM   #3
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Hey mike if you have a no start the first things to look at would be;
1:Check for codes- cycle key without starting engine on-off-on-off-stay on, check engine light will flash out any codes stored like flash* pause * flash * flash - would be 12 a 55 means all stored codes have been flashed. this code may help put you on the system or circuit causing your problem.
2:Fuel- which you have done, can also check injectors with a noid light if you have one
3:Spark- are you getting spark from the ignition coil, is this spark making it to your cylinders?
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Old 05-01-2014, 09:13 PM   #4
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no codes popped up..

moving on to other steps..
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Old 05-01-2014, 09:17 PM   #5
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whats the easiest way to check for a spark? will not having a spark make my engine die while it is already running?
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Old 05-01-2014, 09:52 PM   #6
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it would die if something failed to cause you to lose spark. easiest way to check pull plug boot off of spark plug, rest on plug with boot over plug, dont click into place,have someone stand by the engine compartment while you crank it. if you have spark the person by the engine bay will hear a distinct clicking sound
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Old 05-02-2014, 08:52 AM   #7
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mine did the same thing turned out to be the distributor rotor, it broke in half while accelerating to freeway speed....mine died suddenly, no boggin or nothing just QUIT.

try taking a peek

mine turned out to a chineese knockoff of the real part, fixed that really quick by getting a mopar one
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Old 05-02-2014, 12:11 PM   #8
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No codes at all? Does the check engine light come on at all?
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Old 05-02-2014, 03:11 PM   #9
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Viking: to be honest im not really exactly sure what i am looking for regarding the codes. the check engine light comes on and stays on... unless i am doing the sequence wrong, i did on/off/on/off/on and the light stayed on..
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Old 05-02-2014, 03:27 PM   #10
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im going to check the spark.. we will see what happens... OOOOh im excited
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Old 05-02-2014, 07:38 PM   #11
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be sure the key cycling sequence happens within 5 seconds
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Old 05-03-2014, 12:53 PM   #12
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i think your supposed to switch on 5 times not 4..


like this on/off on/off on/off on/off then back to on for it to give codes
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Old 05-03-2014, 04:57 PM   #13
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Ok here the down and dirty on retrieving codes
1: turn key one click forward from lock ( this position will be considered off, the run position will be considered on)
2: from off position (as described above) turn on, off, on, off, on and leave on
3: your check engine light will remain on for 5 seconds ( have pen and paper ready)
4: after light turns off it will begin to flash your codes in groups. Flashes close together will be added together to get one digit. So flash--flash--flash--------flash--flash--flash---- will be 33, codes are two digits numbers
5: record all codes until code 55 is flashed 55 means end of list
6: after 55 it will flash the codes again, this is your chance to double check your codes
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Old 05-08-2014, 11:12 PM   #14
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Hey guys sorry been busy with work. Turns out I got code 11 and 33. 11 is an a/c isn't connected which I'm not worried about, 333 is a bad crank sensor which would make sens3. I'm switching it out tomorow morning and I'll let u all know what happens...
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Old 05-08-2014, 11:12 PM   #15
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33*
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Old 05-09-2014, 11:37 AM   #16
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Crank sensor was the problem.. thanks for Ur help guys...
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Old 06-17-2014, 11:56 PM   #17
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I have 89 yj when going up hill loss of torque plz help when on flat surface its ok
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Old 10-10-2014, 09:59 AM   #18
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where did you find out what the codes meant? like 333. what told you that was the crank sensor?
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Old 10-10-2014, 03:32 PM   #19
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[QUOTE=bornjeeper;13972258]where did you find out what the codes meant? like 333. what told you that was the crank sensor?[/Q

Jeep Horizons :: 1991-1995 Jeep Wrangler (YJ) Trouble Codes
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Old 10-10-2014, 03:33 PM   #20
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I have had to replace the CPS twice in my 91YJ and neither time has it given me a code......
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Old 10-10-2014, 06:59 PM   #21
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Thanks for the link. I am having a similar problem.
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Old 10-10-2014, 08:41 PM   #22
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I had fo replace crank sensor on my 90 it never showed a code
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Old 10-10-2014, 09:03 PM   #23
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How did u isolate that as the problem? Do u mean the crankshaft position sensor?

I can't find that sensor. Where is it? Service manual says it is behind the right from engine mount but I'm not seeing it.
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Old 10-11-2014, 10:00 PM   #24
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found the crank sensor and did not fix the problem. and for those who are looking for the crank sensor this is where mine is; its a 4 cylinder 2.5. sensor is on the driver side of the engine block. the actual sensor is bolted onto the bell housing on the driver side and the tail end is connected next to the fuel rail. reference link

http://www.4x4xplor.com/images/cps/DSC02130.jpg

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